to solve the irrigation problems in water scarce regions

2. DRIP IRRIGATION
Presentedby:
Hassan Noorani
BagF14M064
Department of agronomy, University college of agriculture,
University of Sargodha

3. It is the artificial application of water to crops rather than rain water to
over come its daily water requirement for better growth.

4. Gravity or tradional
irrigation methods
Prassurized irrigation
methods

5. In this type of irrigation water drip slowly to the
roots of many different plants, either onto the soil
surface or directly onto the root zone, through a
network of valves, pipes, tubing, and emitters.

6. A surface drip irrigation system uses close emitter
spacing (12”-18”) and a thin wall (8-10 mil) drip
line injected 1” to 6” below the surface.

7. A subsurface drip irrigation (SDI) system uses 20”
27” emitter spacing and a slightly thicker wall (13-
15mil) drip line injected 8” – 14” below the
surface.

9. To maintain the pressure and addition of
fertilizer in irrigation water

10. Q=27.78(AD/RT)
Where:
Q=Discharge of pump
A=Area(ha) D=Depth of irrigation(cm)
R=No of days for which water is pumped
T=Duration of pumping(hrs/day)

11. Example
A= 5 ha
D = 100 cm
R = 150 days
T = 6 hrs/day
Q = 15

12. The mainline is the pipe that goes from the water
source to the Isolation valves.

13. The lateral is the pipe located between a
isolation valve and the drip tube

14. This tube is connected to sub-main and emitters are installed on this tube.

15. Valves turn on or off the water flow through a pipe
Isolation valves :are manually or power
operated valves used for infrequent
shut-off of the water.
Control valves: are the valves that turn
on and off the water to individual
“circuits” or areas of the yard that are
irrigated separate from one another.

16. This device prevents the irrigation system water from
being siphoned back into drinking water.

17. A pressure regulator reduces the water pressure and
keeps it at a constant level.
Non-adjustable pressure
regulator
Adjustable-type
pressure regulator

18. The filter cleans the water

19. These connect to the tubing or can be inside the
tubing and deliver water at a slow, consistent rate,
usually, 0.5, 1, 2 gallons per hour.

20. (end-of-line)
Flow Rate: ½ GPH
1 GPH
2 GPH

21. Flow rate: ½ GPH
1 GPH

22. Flow rate: 1 GPH
2 GPH
3 GPH

23. It is provided at the end of each sub main to flush
out the water and dirt’s.

24. WU= ET∗ Kc∗ Cp∗ A
Where WU is water usage, Et is
evapotranspiration, Kc is crop factor, Cp is
canopy factor, and A is the area in m2

25. • No water to runoff, deep percolation, or evaporation.
• It reduces water contact with crop leaves, stems, and fruit.
• Less favorable for the onset of diseases.
• Precisely to meet crop demands
• Increases yield and quality
• Efficient application of chemicals
• Adaptable to oddly shaped fields, any soil texture (even
excessive infiltration, water puddling, or runoff).
• Precise application of nutrients

26. • High Cost
• Leaking or plugging of drip lines and
emitters
• Drip tape causes extra cleanup costs after
harvest.